diff --git a/.circleci/config.yml b/.circleci/config.yml
index 976030d..416cb23 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,6 +1,6 @@
 exec: &exec
   name: build-tools/nerves-system-br
-  version: 1.20.5
+  version: 1.20.6
   elixir: 1.13.4-otp-25
 
 version: 2.1
diff --git a/mix.exs b/mix.exs
index bffff50..ad8bec3 100644
--- a/mix.exs
+++ b/mix.exs
@@ -67,7 +67,7 @@ defmodule NervesSystemGrisp2.MixProject do
   defp deps do
     [
       {:nerves, "~> 1.6.0 or ~> 1.7.15 or ~> 1.8", runtime: false},
-      {:nerves_system_br, "1.20.5", runtime: false},
+      {:nerves_system_br, "1.20.6", runtime: false},
       {:nerves_toolchain_armv7_nerves_linux_gnueabihf, "~> 1.6.0", runtime: false},
       {:nerves_system_linter, "~> 0.4", only: [:dev, :test], runtime: false},
       {:ex_doc, "~> 0.22", only: :docs, runtime: false}
diff --git a/mix.lock b/mix.lock
index 15be6ad..8784f22 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,13 +1,13 @@
 %{
   "castore": {:hex, :castore, "0.1.18", "deb5b9ab02400561b6f5708f3e7660fc35ca2d51bfc6a940d2f513f89c2975fc", [:mix], [], "hexpm", "61bbaf6452b782ef80b33cdb45701afbcf0a918a45ebe7e73f1130d661e66a06"},
-  "earmark_parser": {:hex, :earmark_parser, "1.4.26", "f4291134583f373c7d8755566122908eb9662df4c4b63caa66a0eabe06569b0a", [:mix], [], "hexpm", "48d460899f8a0c52c5470676611c01f64f3337bad0b26ddab43648428d94aabc"},
+  "earmark_parser": {:hex, :earmark_parser, "1.4.27", "755da957e2b980618ba3397d3f923004d85bac244818cf92544eaa38585cb3a8", [:mix], [], "hexpm", "8d02465c243ee96bdd655e7c9a91817a2a80223d63743545b2861023c4ff39ac"},
   "elixir_make": {:hex, :elixir_make, "0.6.3", "bc07d53221216838d79e03a8019d0839786703129599e9619f4ab74c8c096eac", [:mix], [], "hexpm", "f5cbd651c5678bcaabdbb7857658ee106b12509cd976c2c2fca99688e1daf716"},
   "ex_doc": {:hex, :ex_doc, "0.28.5", "3e52a6d2130ce74d096859e477b97080c156d0926701c13870a4e1f752363279", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "d2c4b07133113e9aa3e9ba27efb9088ba900e9e51caa383919676afdf09ab181"},
   "makeup": {:hex, :makeup, "1.1.0", "6b67c8bc2882a6b6a445859952a602afc1a41c2e08379ca057c0f525366fc3ca", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "0a45ed501f4a8897f580eabf99a2e5234ea3e75a4373c8a52824f6e873be57a6"},
   "makeup_elixir": {:hex, :makeup_elixir, "0.16.0", "f8c570a0d33f8039513fbccaf7108c5d750f47d8defd44088371191b76492b0b", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "28b2cbdc13960a46ae9a8858c4bebdec3c9a6d7b4b9e7f4ed1502f8159f338e7"},
   "makeup_erlang": {:hex, :makeup_erlang, "0.1.1", "3fcb7f09eb9d98dc4d208f49cc955a34218fc41ff6b84df7c75b3e6e533cc65f", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "174d0809e98a4ef0b3309256cbf97101c6ec01c4ab0b23e926a9e17df2077cbb"},
-  "nerves": {:hex, :nerves, "1.9.0", "1124aeeb492e320b431eb4224d73bf4c079062d428a93758d2616a4461666aa7", [:make, :mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: false]}, {:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:jason, "~> 1.2", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "fbc409636fbcf3525a3c1895c2ac164bfc33af0c79bba158e070a98c70f2a1ee"},
-  "nerves_system_br": {:hex, :nerves_system_br, "1.20.5", "d61541bf83ae97a2bb0f7dd3e144579b16d518635bc9c1e3063b78521d5264e4", [:mix], [], "hexpm", "cd7450a8186d6e717d07fcb9834df509d7a1d6cdb39c6c982a6aa762ea7f48cd"},
+  "nerves": {:hex, :nerves, "1.9.1", "09cfd3589af81c4b1ac35179aee5f6d94bde36548a905c2d4d4efa9ff311222e", [:make, :mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: false]}, {:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:jason, "~> 1.2", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "011409116923e1dbab250a6dc241ab529790163233c44e374ff352af72d09a56"},
+  "nerves_system_br": {:hex, :nerves_system_br, "1.20.6", "6622ee4230e968a95716105518bbd7ef569ac82b44e9114cf6a78a1ddca65455", [:mix], [], "hexpm", "ca187a129288156a1e5fb4f34d393aeddb7580091f41aefb82dbed6a4e378748"},
   "nerves_system_linter": {:hex, :nerves_system_linter, "0.4.0", "81e9a6f5018fe5fb67d7b43a04dca36156f62b55b5554eb2fa3964d3889d09cd", [:mix], [], "hexpm", "b5bd8480ce7a6317f4601ff41fd2f594bdf76aff0bdf6dcfac571c3fa1ec5f82"},
   "nerves_toolchain_armv7_nerves_linux_gnueabihf": {:hex, :nerves_toolchain_armv7_nerves_linux_gnueabihf, "1.6.0", "ed30bc7cb1853ef306a185cf2b24f9e8fb296dbc2839bf303302b46288c2cbd3", [:mix], [{:nerves, "~> 1.0", [hex: :nerves, repo: "hexpm", optional: false]}, {:nerves_toolchain_ctng, "~> 1.9.0", [hex: :nerves_toolchain_ctng, repo: "hexpm", optional: false]}], "hexpm", "ed68e12550f9b5ed4eda1b291a3ef2368a99a3fd89690a207b8f9cd576861109"},
   "nerves_toolchain_ctng": {:hex, :nerves_toolchain_ctng, "1.9.0", "fe53615624763eeb5db6a5022a4fb5de8622405f314dba089b17fbf35d502529", [:mix], [{:nerves, "~> 1.0", [hex: :nerves, repo: "hexpm", optional: false]}], "hexpm", "80b0225108960a8433a81c0fbb5df1508b4015c222077361895e1b3a2f7c42d1"},